<html>
<head>
    <title></title>
    <link  type="text/css" rel="stylesheet" href="css/a.css" />
</head>
<body>
<h1>login.html</h1>
<img src="img/img2.jpg"/>
<form>
    username:<input type="text"/>
    <input type="submit" value="登录"/>
</form>

</body>
</html>